Base Difficulty

Base difficulty: Level 105 edit

Level distribution for adverb (style): 6: 1 19: 4 20: 4 105: 46 1080: 1 1202: 1 1399: 2

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-1399 for level
Frequency and Tier Signals
Combined Frequency Rank: 1618 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B1 (3 of 6) 4200

Rank used = synthetic rank this tier contributes to the combined frequency rank (lower = more common).

Corpus Frequency
Corpus Freq (per M) Best form Share Zipf rank Forms
19th_books 66.71 1374 100% 1374 1
20th_books 71.09 1347 100% 1347 1
wiki_math 103.65 1203 100% 1203 1
wiki_geography 99.32 1401 100% 1401 1
wiki_biology 132.15 1066 100% 1066 1
wiki_modern_life 122.49 1185 100% 1185 1
wiki_arts 95.90 1445 100% 1445 1
wiki_society 81.24 1733 100% 1733 1
wiki_linguistics 122.26 1052 100% 1052 1
wiki_physical_science 146.42 998 100% 998 1
wiki_history 95.61 1388 100% 1388 1
early_modern_science 113.47 1019 100% 1019 1
religious_translated 18.37 4299 100% 4299 1
cooking 43.94 1906 100% 1906 1
legal_scotus 41.27 2752 100% 2752 1
eu_parliament_debates 139.84 851 100% 851 1
openstax_science 166.55 862 100% 862 1
openstax_society 77.23 1781 100% 1781 1
wpa_life_histories 36.60 2312 100% 2312 1

Best form = the single best-ranked form in the corpus, share-blind — how the spelling itself ranked. Share = how much of that spelling belongs to this lemma, when several senses compete for it. Zipf rank = all the forms combined (variant spellings included), each scaled by its share, and what feeds the combined frequency rank. Combining forms improves on the best form, but a share below 100% pushes the other way and usually wins: a sense holding a small slice of a common spelling is a rare word, so its rank lands downrated below the best form — and once it falls past what the corpus can support it is capped at the rank an unlisted word would get.